Valve



Patented .luly 14, 1931 UNITED siiss .Niaivr omer.

GEORGE J. HACHMEISTER, OF DES PLAINE'S, ILLINOISJASSIGNOR TO G. Iii. DAVIS REGU- LATOR COMPANY, OF CHICAGO, ILLINOIS,A CORLPORA'IION 0F ILLINOIS VALVE Application inea May 2o,

io bers themselves are rigidly and positively connected. Another obj ect of my invention is to associate with a rigid valve member automatic positive packing means for preventing leakage. Another object is to provide 15 leakage preventing means in connection with a reciprocating valve member positively op,

erated independent of position of the valve member in its seat a'r'ter initial closing and wherein movement of the valve member in the 2O direction of opening will immediately unseat and release the leakagewheel. Other ob! jects of the invention will appear from time to time throughout the specication and claims.

My invention is' illustrated more or less diagraminatically in the accompanying drawings, wherein- Figure l is a longitudinal section;

Figure'is a section along the line 2-2 of Figure l.

Like parts are indicated by like characters throughout the specification and drawings.

A is a spherical valve housing having` an inlet passage A1 and discharge passage A2,

i there being the usual flanges A3 A4 around such passages to connect them with pipes or conduits in the usual way. y

Contained within the valve is an interior G ywall B ported above and lbelow asat B1 B2,

these ports being concentric so that when open, gas which enters the passage A1 passes out through the ports VB1 and B2 into that part of the valve exterior to the member B and 5 thus out through the passage A2.

Threaded ineach of the ports B1 B2 are valve seat rings C C1. The valve seat ring G has a cylindrical portion C2 terminating in an outwardly expanding tapered cut valve seat C3. The seat ring C1 has a cylindrical 1929. Serial Noi. 364,358.

portion C1 and terminates at its upper edge in an annular flange or packingseat G5.

D D1 are rigid valve discs positively fixed in position on the valve stem D2. They are guided as they reciprocate through the seatl rings C C1 by guide ribsv D3 formed by radial flanges D4. D5 is a link pivoted on the upper end of the stem D2 and `carried by the valve control lever DG in a housingD7 which registers with the opening DS in the top ofthe valve body. D9` is a control shaft pivoted in and extending through the wall of the housing VD7 and having thereon'a counterweight lever D10 notched at D11 to carry the counterweight D12v adjustable in` position to provide a balance for the valve. The lvalve D' is largerin diameter than the valve D1 so that there is'a slightunbalance which 4must be counterbalanced by the weight D12 to'maintain the valve seated, thearrangementbeing such that when the pressure exceeds a predetermined amount the imbalance of the two valve discs: will overcome the weight of the counterweight and open-the valves.

The valve disc D terminates in a tapered seat engaging iange E so that this valve disc guided inthe seat ring comesto a positive seat on the ring and may be ground tomake a tight lit thereby preventing leakage. The same thing could be done for the lower valve if it were not for thel fact that the changes in temperature and pressure change the length of the valvestem and the distance between the two' valve seats. Therefore the valve disc D1 has no such taper flange but closes with respect to the seat C1 by the cylindrical wall E1 penetrating 'the ring C1, there being only sutcient clearance between the cylindrical portion of the valve andthe seat to permit movement of thevalve. Such clearance7 however,k always results in a certain amount of leakage. This leakage is prevented by the use of a flexible plate or packing ring E2. This ring ispreferably annular, encircles the stem D2 and is held upon an abutment or boss E3 on the upper'face of the valve disc E1 by the periphery of the" valve disc' D1 and eniQ- venting leakage. Assoon as: the valve moves gages the packing seat C5 as indicated. Assuming the valve D as being seated on the seat C, the packing disc E2 will be preferably so positioned with respect to its seat B2 that when the distance between the valve D and the disc E? has a mininiurn, there will still be e Content between hePer'SqBi E? the valve will be closed. It for any reason either wear of the valve surfaces associated with t-he partsG-D or expansion and contraction of the parts, the distance between the valve combination C-D and the valve combina; tion lig-E2 increases, the valve combination C-D can remain seated, theflezibility of the packing ring E2 taking care of any difference oli dimensione wtlnn the reasonable working renee off'tlie, valve. When the valve. coin-4 Inenees to. onen. upward movement of the valvev will not atnet-.eneeed theBeTE? Celnr.

i binnton- The ningwill bend neinainine in. eontaot withV the; seat. B? until the; ring engaoesfftliemember D1: at which time itvvill be.- li f efliol iteseat The1 use. and; openation, of. my; invention are eefollones ,This valveI fle-itsv on the line loengf Closed whenpresenre. `on the right, hand, eideie levi e. preeletenmined. anneei.l-t` end opens auto,- Inatieellyf ovina.I to` its unbalanee when: pees.- Snre ,exceeds ntedetermi,nedV- ernennt- Wheneven the valve-is seated the upper; Per: tienlieepesitively Cleseflby the positive sente ing ot the inelinefl flange) ont the valvev dise withx theinclinedv sent on the, valve ringl but t there is` leakage between the tivo in;-v

teiinnptna lower Cylntlrenl; valve nielnbene-v leakage ierennell bntelnnyeepreeent andA it innet1 loe.v Present; beeenee in onderthat the velve may wen-li. tnenernuetcbee .el'eenenee be?.

vttveen the Cylinelrieali valve endl the Cylindreel Seat, and: peeking- Ineene. that might; be. interpoeetl between them ovina tothe Slow movement of.. the vel've enel the; delicacy of the valve` andl its` construction is unsatiisfactcryl interfering as; it does; with valve movement, The* flexible, valve ningl seatingas it doers on aseparate valveseat andj` supported bythe-valve: solves- `the problem of, preventing leakage through the, annular. clearance betweenthe valve andvalve seat. This` fngmnyfgive a,nel eliveyezeeats because the partsare soarrangedjor the-, highest,position of the lower, valveniernber withrespect; tothe upper that there is alwayscontat. As changes :take place moving the lowery valve down with vrespect lto the-upper, there visstill' seating iofthe lexiblediscand the discis suflicientlyllexible so thatforsuch-position itcon-v formsto and lengages theseait, thereby` prettoward. the .open position the leXible.- valve..v

member is picked up. and carried up to travel with the Arigid valve nuernbergl Owingte the,

relation between, the,` abutmentg supporting the-.flexiblelneniberffromfbelow endtheholding ring holding it from above the flexible valve ring is free to bend upwardly mor(` rapidly than it has to bend down, thus there is no interference with its seating or by it with the seating of the positive seated valve disc above and there is an early and positive lifting of the ilegible member from its seat as the valve moves up.

I claim:

1. In combination, a cylindrical valveA seat, a cylindrical valve mounted for reciprocation therethrough, there being working clearance between the valve and the seat, a flange projecting upwardly from one end of the seat, concentric therewith, there being a elearnnee radially laetvveenA the. innen peripheny of the flange andA theinnenperiphery of tlievalfve eeat the flange havingaplane surf. f aee perpendienlan to.. the line otV reeproeatien ofthe valve,` a boss, on the valve Project ing. upwardly above the Seat.y engaging the periphery thereof andi havingy plane. sun ieee parallel; with, the. plane sunf'aee on the flange,` aiieXible plate, ineen-s; for holding it. on: the: bees, the platee projeeting` nadiallyto. ovenlieeysaid flange 2f, lneornbinetiona o vlinclnieal valve seat, aeylinelriealiveliemonnted:foniieeipnoeatien therethrough, there being.` working` clearance between, the valve. and; the Sean. a.- la-nge peor. jeetngnpnerdly fnoni one enel ot the Seat. Ceneentiie tberewitbhere beingfa clearancev radially between the inner periphery, oft the liange and: the` innenpelplielni of: the, valve Seat, the. langelheving a plane enriaee per-l if lel with the plane surfacel en theV flange, a i

flexible platee` means for; holding. it: on; the boss, the plate projecting radiallyl to,ovverlie said flange, the plate being unsupported between-the bose-endend flange in line lwith the clearance between the valve and the seat.A

In i Combination; a: Cylindiieal valve-Seat, e Cylindrical valve adapted tofslfle therein ancl'yelose the openngtberetlnongli, 4annuniliary, valve seatconcentric with. the lirstv I iainedI seat and projecting aboveone end thereof, la ,flexible plate,overhanginggthe auxiliary valve seat, a plane snrfaceboss on the valvel `of lesser diametenthan the valve upon which:A the flexible plate is perinanentlymounted, th flexiblev plate beingI unsupported between the boss andithe auxiliary v'alveV seat, the unsupported portion of" the plate o verhanging theclearance area between the cylindrical valve and'itsseat.

Signed at Chicago, county-o liCook, andV Statevof'lllinois, this 18th-day off'May, 1929. 

